Please compress the address 2001:0DB8:0000:C030:0000:0000:09A0:CDEF. ()

As shown in the figure, the network layers of R1 and R2 are directly connected, and there are layer- 2 transmission devices S71 and S72 in the middle of the link.

Now the user hopes that the devices at both ends can quickly sense the failure of the intermediate link, thereby triggering rapid route convergence, which of the following detection mechanisms should be configured?

Which statement about multicast packet forwarding is correct?

OSPF is a link state protocol. Link state information includes which of the following items? (Multiple choice)

RSTP defines four port roles. Among them, the Part role value of the Alternative port and the Backup port in the flags field of the STP packet is always 01.